relative luxury at the home in contrast to Kana's constant unintentional neglect. In cat years, he is 20 years old, older than both Nano and the Professor, and tries to act like the adult of the house, but he occasionally succumbs to his shameful catlike habits. A running gag is his tendency to endure the Professor's comically horrific physical abuse, usually in the form of a childish booby trap or the rope noose that she uses to walk him. Teachers Izumi is a young, constantly flustered and easily frightened teacher. She is an English teacher, a career adviser and a school counselor. She tries to enforce the school rules, but is typically unable to accomplish much due to her passivity. Even though she is often nervous and a pushover at school, she is marginally more brave when it comes to her younger brother Makoto, once confronting him about an erotic magazine found in his room. Manabu is a male teacher who has romantic feelings for Izumi, but is unable to tell her as he thinks too much and is too shy to admit it. These feelings lead him to become the club adviser for the go-soccer club after Makoto bribes him with pictures of his sister. The Principal is the middle-aged bald principal of Tokisadame High, where part of the story is set. While known for his old jokes and puns, unknown to most, he is a talented wrestler. He is referred to as "Principal Shinonome" implying that he may be the Professor's father or relative, but this was never revealed in the series. The Vice Principal is known for wearing glasses and a yellow tie. He hates the Principal and doesn't hide the mean things he does to him. He was the previous principal of the school and is incredibly bitter about his demotion, so much so that he began to drink heavily and send daily death curses to the Principal. His constant drinking and stress have utterly destroyed his body, and he describes himself as being one drink away from liver failure at all times. Kana is a science teacher who is fixated on Nano's robotic nature. She constantly schemes to capture Nano for study, but her machinations invariably backfire, like drinking coffee from the same tranquilizer-spiked jug that the coffee for Nano was from. As such, it is a running joke that she is not there to